Liu Wei Di Huang Wan is a medicine for kidney yin, the tonic should be eaten for an appropriate period of time, so it can be eaten for a long time, of course not all year round, but it is not a problem to eat 1-2 months. But take the medicine must pay attention to the fact that it must be eaten on the premise of accurate diagnosis, that is, you need to know that you are indeed a case of kidney yin deficiency. There are signs and symptoms of kidney yin deficiency, such as heart trouble, insomnia or heat in the palms of the hands and feet. It is best to look at the tongue and observe the tongue, if it is red and less mossy you can take Liu Wei Di Huang Wan. If the tongue is thicker and greasier don’t eat it, so take the medicine to see if there are indications.